I’ve written on a number of occasions on Briffa’s Polar Urals reconstruction, which is used in nearly every multiproxy reconstruction, no doubt because of its uniquely cold MWP. It’s one of the key series in Crowley and Lowery [2000] and Jones et al [1998]; it’s not as important in MBH98-99 (which is more or less […]
I’ve commented before on the lack of independence between authors in the supposedly "independent" multiproxy studies: Mann et al [1998, 1999], Jones et al [1998], Mann and Jones [2003], Crowley and Lowery [2000], Briffa et al [2000]. I’ve mentioned in passing that the proxies themselves are not independent, but not provided lists to show the […]
One of the big selling points of Crowley and Lowery [2000] was the “non-synchroneity of temperature change”. One of the key series in showing this was Zhu [1973]. I located Zhu [1973] today. It was great fun, not least for Zhu crediting the teachings of Chairman Mao for inspiring his work. I even reminisce a […]
US Congressman Joe Barton expressed some thoughts here (link courtesy of Jerry Brennan).
I reported recently on that the recently archived (July 2005) source code multiproxy.f shows that the cross-validation R2 statistic was calculated and not reported. Today, I’m merely going to summarize some collation details from my inspection of the code, listing input files, output files and providing a lexicon of variables. The source code requires a […]
In our GRL article, we pointed out that MBH98 had misrepresented their principal components methodology as being "conventional", when it wasn’t. At realclimate , they argued that it was an alternative centering "convention".
In some of our discussions of data archiving, the principal rationalization of a researcher’s not archiving data at recognized permanent archives (such as WDCP) has been the argument that they should be able to maintain confidentiality for a period of exclusive use. I’ve noticed that some researchers have established password-protected private archives, to which some […]
Let no one say that I don’t give credit where credit is due. Keith Briffa, yes Keith Briffa, has archived 13 tree ring site chronologies at WDCP: it’s only 17 years since publication and 22-24 years since collection, but who’s counting?
I was collating information on Thompson’s archiving of ice core information and noticed something interesting on the Puruogangri glacier in the Himalayas drilled in 2000 and still unarchived. (Thompson is one of the 20 wise men who recently weighed in with the Barton Committee on behalf of MBH.) In addition to not being archived, I […]
Here is a discussion of two of Bradley’s answers to questions from the House Committee letter pertaining to federal grants and archiving.
Climate Audit 